garage/src/table/replication/parameters.rs
2021-03-11 16:54:15 +01:00

22 lines
748 B
Rust

use garage_rpc::membership::System;
use garage_rpc::ring::Ring;
use garage_util::data::*;
pub trait TableReplication: Send + Sync {
// See examples in table_sharded.rs and table_fullcopy.rs
// To understand various replication methods
// Which nodes to send reads from
fn read_nodes(&self, hash: &Hash, system: &System) -> Vec<UUID>;
fn read_quorum(&self) -> usize;
// Which nodes to send writes to
fn write_nodes(&self, hash: &Hash, system: &System) -> Vec<UUID>;
fn write_quorum(&self, system: &System) -> usize;
fn max_write_errors(&self) -> usize;
// Which are the nodes that do actually replicate the data
fn replication_nodes(&self, hash: &Hash, ring: &Ring) -> Vec<UUID>;
fn split_points(&self, ring: &Ring) -> Vec<Hash>;
}